Results 31 to 40 of about 1,057 (192)

Some peculiarities in longitude distribution of sunspot groups over last four eleven-year solar cycles

open access: yesSolar-Terrestrial Physics, 2016
This paper considers a longitude distribution of sunspot groups over 1982–2013, using data from the National Geophysical Data Center (Boulder, USA).
Rybak A.L.
doaj   +1 more source

Effects of LED Light Exposure on Lutein and Bioactive Compounds in Nasturtium Flowers (Tropaeolum majus L.)

open access: yesFuture Postharvest and Food, EarlyView.
Red LED supplementation during cultivation modulated the accumulation of bioactive compounds in Tropaeolum majus flowers. Moderate exposure (3–5 h) enhanced antioxidant capacity and increased carotenoids, phenolics, and anthocyanins depending on petal color, highlighting a simple strategy to improve the functional value of edible flowers. ABSTRACT This
Amanda Lais Alves Almeida Nascimento   +8 more
wiley   +1 more source

Maximum Sunspot Numbers and Active Days [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2013
Parameters associated with solar minimum have been studied to relate them to solar activity at solar maximum so that one could possibly predict behaviors of an upcoming solar cycle.
Heon-Young Chang
doaj   +1 more source

Spatiotemporal Changes and Climate Driving Factors of Compound Precipitation‐Temperature Extreme Events Across Global Land Areas

open access: yesInternational Journal of Climatology, EarlyView.
During the period 1901–2024, the dominant proportion of compound dry‐warm extremes in annual, June–July–August (JJA), and December–January–February (DJF) occurrences was the highest among the four types of compound precipitation and temperature extremes across global land areas, accounting for 40.1%, 50.3%, and 28.0%, respectively.
Ruting Yang   +6 more
wiley   +1 more source

A 22-year cycle in the F layer ionization of the ionosphere [PDF]

open access: yesAnnales Geophysicae, 1997
The double-sunspot-cycle variation in terrestrial magnetic activity has been well known for about 30 years. In 1990 we examined and compared the low-solar-activity (LSA) part of two consecutive cycles and predicted from this database and from ...
E. Feichter, R. Leitinger
doaj   +1 more source

Complexity in the sunspot cycle [PDF]

open access: yesAstronomy & Astrophysics, 2009
The occurrence of complexity in the solar cycle, as monitored by the sunspot area butterfly diagram, is investigated by means of the natural orthogonal composition (NOC) technique and information theory approach. Although the butterfly diagram may be reconstructed using only two modes as already found in other papers for the Hale cycle, on deeper ...
G. Consolini, R. Tozzi, P. De Michelis
openaire   +1 more source

The Functional Role and Molecular Characterization of the Therapeutic Target CLDN6 in Germ Cell Tumors

open access: yesAndrology, EarlyView.
ABSTRACT Background The tight junction protein CLDN6 has been identified as a cancer‐associated cell surface marker that is rarely expressed in healthy tissues. In testicular germ cell tumors (GCT), CLDN6 is particularly detectable in seminomas, embryonal carcinomas, and choriocarcinomas.
Jule Zwick   +7 more
wiley   +1 more source

The oscillatory response of the electroretinogram and neuronal adaptation

open access: yesActa Ophthalmologica, EarlyView.
Abstract After more than 50 years, there still remains a challenge and an interest to know more as well as extend and deepen our understanding of the small rapid wavelets, the oscillatory potentials (OPs), of the electroretinogram (ERG) and the neuronal adaptation of the retina.
Lillemor Wachtmeister, Anders Eklund
wiley   +1 more source

The effect of rhegmatogenous retinal detachment on retinal oxygenation

open access: yesActa Ophthalmologica, EarlyView.
Abstract Purpose Little is known about the effects of retinal detachment on oxygen extraction from retinal vessels. The role of oxygen supply from the retinal vessels in a detached area has not previously been investigated in vivo in humans. Retinal oximetry is a non‐invasive measurement of retinal oxygen saturation.
Anne‐Sofie Petri   +8 more
wiley   +1 more source

Retinal dystrophies simulating geographic atrophy: A diagnostic challenge

open access: yesActa Ophthalmologica, EarlyView.
Abstract Geographic atrophy (GA) is the chronic loss of retinal pigment epithelium, photoreceptors and choriocapillaris, marking the dry late stage of age‐related macular degeneration (AMD). GA prevalence is expected to rise in the upcoming decades. Advanced GA leads to central scotomas, reducing visual acuity and quality of life, potentially resulting
Johanna M. Colijn   +3 more
wiley   +1 more source

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